YourToolsBuddy

Simple & Compound Interest Calculator

Compare simple interest and compound interest with a chosen compounding frequency.

Choose the option that matches your situation.

Enter starting amount; see assumptions below for the model limits.

Enter nominal annual interest (%); see assumptions below for the model limits.

Enter term (years); see assumptions below for the model limits.

Choose the option that matches your situation.

Changes the currency label; amounts are not converted.

Your results

Interest earned
$500.00
Final amount
$10,500.00

Calculations run in your browser. Results are estimates where described below.

How the calculation works

Simple: A = P(1 + rt). Compound: A = P(1 + r/n)ⁿᵗ.

Worked example

10,000 at 5% simple interest for one year earns 500.

Assumptions and limits

No additional deposits, taxes or fees. The compounding frequency affects compound mode only; daily uses 365 periods per year.

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